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Electromagnetic Field Theory

Electromagnetic Field Theory
An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m 2 is

 75.
 50.
 1/75.
 100.

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Orbiting satellite
Geostationary satellite
Active satellite
Passive satellite

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Electromagnetic Field Theory
If the static magnetic flux density is B, then

 Curl of B = J.
 Curl of B = 0.
 Divergence of B = J.
  Divergence of B = 0.

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Electromagnetic Field Theory
If E is the electric field intensity, then what is the value of divergence of (curl of E)?

 | E |.
 Zero.
 E.
 Null vector.

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Electromagnetic Field Theory
The main disadvantage of the two-hole directional coupler is

High standing wave ratio
Narrow bandwidth
Low directional coupling
Poor directivity

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Electromagnetic Field Theory
A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is

 2 × 108.
 2 × 10-8.
 2 × 106.
 2 × 10-6.

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MORE MCQ ON Electromagnetic Field Theory

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